Metal strip or clamp for use in manufacture of cardboard boxes.



- No. 699,894. I Patented May l3, I902.

v 9 M. R. PABTZSCH. I r METAL STRIP 0R CLAMP FOR USE IN MANUFACTURE OF CARDBOARD BOXES.

- A umin filed Sept. 13, 1897.

(No Model.)

Y NORRIS PETERS ca. Prioro-Lrruonwnwlrmron n c UNITED STATES- "PATENT OFFICE.

MAX RICHARD PARTZSOH, OF DRESDEN, GERMANY.

METAL STRIP OR CLAMP FOR USE IN MANUFACTURE OF CARDBOARD BOXES.

SPECIFICATION formingpart of Letters Patent No. 699,894, dated May 13, 1902.

Application filed September 13, 1897. Serial No. 651,486. (NomodeL) To all whom it may concern.-

BeitknownthatLMAXRroHARD PARTZSCH, a subject of the King of Saxony, residing at Dresden, Saxony, Germany, have invented certain new and useful Improvements in or Relating to Metal Strips or Clamps for Use in the Manufacture of Cardboard Boxes and for Similar Purposes, of which the following is a specification.

This invention relates to improvements in metallic fastening strips or clamps for uniting or strengthening the edges of boxesof cardboard or other material.

In the accompanying drawings, Figure 1 is a plan view of a blank from which the strip or clamp is made. Figs. 2, 3, and 4, are'respectively a side elevation, a plan, and crosssection of a strip or clamp made according to Fig. 5 is an inverted the present invention. perspective view of the strip or clamp.

Similar letters of reference in the several figures indicate the same parts.

In the manufacture of boxes of cardboardor other similar material strips or clamps are employed for uniting or strengtheningthe edges of the cardboard, which are provided with teeth for securing the strips or clamps to the material, said teeth being formed by cutting out or indenting the edges of the blank from which the strip is made and bending up such edges. According to the present invention, however, the teeth on the edge of the strip or clamp are formedby depressing at intervals the extreme edge of the strip at substantially right angles to the plane of-the body of the strip, the base-line of each tooth starting from the original edge of the strip and returning to it, and each tooth therefore beward and have an approximately angular cross-section. described frequent and difficult grinding of cutters is avoided, and a thinner, lighter, and less hard and brittle clamp-strip may be employed. So, too, by having the tooth curved or other shape in cross-section they are much more rigid and stronger when driven in the work than flat teeth, the line of attachment of which to the body of the strip is a straight line, such teeth having a small bending strength and the straight bend forming a bad joint, so that it easily breaks while being driven in, whereas the curved teeth are much stronger, and the curved bend does not act as a joint or hinge.

While I have shown and described a fas tener formed from a straight strip, it will of course be understood that it could be curved or othershape, and I do not Wish to be limited to any particular form.

I claim-- 1. As an improved article of manufacture, a flat-bodied metallic fastening-strip having itsextreme edge depressed at intervals, the material fromthe depressions forming teeth projecting at substantially right angles to the plane of the body of the strip, with a space between adjacent teeth, each of said teeth being bent in cross-section in a plane parallel with the plane of the body of the strip the base-line of each tooth starting from the origi- By forming the teeth as thus nal edge of the strip and returning to it; substantially as described.

' 2. As an improved article of manufacture,

a metallic fastening-strip having its edges de- I pressed at intervals, the material from the depressions forming teeth projecting at substantially right angles to the plane of the body of the strip and the sides of each of the teeth extending along the edges of both adjacent projections left by the depressions, whereby a tooth bent in cross-section is formed; substantially as described.

In witness whereof I have hereto set my hand in the presence of thetwosubscribing witnesses.

MAX RICHARD PARTZSOH. Witnesses:

Orro WoLrr,

O. F. AUGEDUMMER. 

